Eveinstaller- A Great tool similar to Ubuntu Tweak for Ubuntu and LinuxMint

"Eveinstaller is great tool similar to Ubuntu Tweak, it lets you
install the basic applications in Ubuntu 11.04 and LinuxMint with a
simple click, also using this tools, you can add Medibuntu, getdeb
, Playdeb repositories , or install elementary theme, Mint theme,
for Desktop, install also with a simple click Gnome3, Unity 2D,
Unity 3D and more."